There's a guy who does the bike events (the bloke I got my 'Do I look like a f*****g people person?', 'Cleverly disguised as a sensible adult' & 'It's funny how certain clothes make you look fat, isn't it?' and a few more I have off him) who will do one-offs. He doesn't charge any more for them (around £15) but I doubt he'll manage anything other than text (no graphics). He acepts e-mails for the design and will print 'em up.
And yes, he does do FB size!!
I'll send you his details and you can talk to him. CAUTION: He's a great bloke and talks for ages on the 'phone so use his freephone number!